Chuck



D. E. CARRIERE.

CHUCK.

APPucATIoN FILED sEPT. 21. |920.

1 ,396,022. n Patented Nov. 8, 1921.

Inventor.

z f @mL/6m UNITED STATES PATENT OFFICE.

.DONALD EMERY CARRIERE. OF CAPE-EOL, ONTARIO, CANADA..

CHUCK.

Application led September 27, 1920.

/"o alli iii/wm t may concern:

Be it known that l,V DONALD EMERY CAR- nimm, a subject of the King of Great Britain, and resident of the town of Capreol, of the district of Nipissing, of the Dominion yof Canada, have invented certain'new and consists in the novel construction of the chuck, whereby the drill or shaft isv sup ported adjacent to the working end by a jaw member slidably connected with the main portion'of the chuck and said extension jaw member is adapted to operate with the main jaw member in gripping the drill or shaft held therein.

In the drawings, Figure l is a side elevational view'oiil my improved chuck.

Fig. 2 is a longitudinal sectional view of the chuck.

Fig. 3 is a 'longitudinal elevational view taken at right angles to Fig. l.

Fig. 4 is 'an enlarged perspective detail ofthe main gripping jaws.

Fig. 5`is an enlarged perspective detail of the supplementary gripplngjaws,l

In the construction of my improved chuck the spindle l is threaded and has pivotally` secured to its outer end a block- 2 which is of an .H shape having the slots 3 at each end,

the block being -secured in countersunk head pin 4.

A block 5 also of an H shape isthreaded on to the threaded portion of the spindle 1 and to each side of said block is secured a side plate 6, the plate being oiset inwardly forming shoulders 7 which abut the top edge of the block 5 and hold the sides rigidly in place.. The plates are secured by means of cap screws 8.

At the upper ends the plates 6 are formed with the inwardly turned convergent iianges 9. A pair of 'aw members 10 are arranged between the side plates 6 and are formed place by the Specification of Letters Patent.

The principal 'feature of the' inventionV Serial No. 413,065.

with channeled lower ends ll which fit into therslots 3 inthe block 2 and convergently arranged grooves 13 are cut in the side faces of the jaw members to receive the converging flanges 9 and the blocks sliding between the plates are thus moved together or drawn apart by sliding on the said convergent flanges.

The jaw members are each formed with horizontally arranged teeth le which interinesh, the teeth of one jaw sliding between the teeth of the other and these jaws are cut in a V shape on their meetinof edges, thus each presenting a V-shaped gripping surface adapted to engage the shaft or drill to be held therein. l

t will be seen that by the rotation of the spindle l in the block the jaw members will be moved outwardly or inwardly according to the direction of. rotation and as they are moved inwardly or outwardly they slide upon the convergent flanges 9 and are drawn in together or separated.

A. shouldered cross bolt l5 is arranged between the side plates 6 about midway of the length of said plates, nuts 16 being secured upon the outer ends.

Each of the jaw members 10 has a cylindrical hole 17 bored longitudinally thereof "and intheseholcs are slidably arranged a pair of rods 18 which have formed or secured to their outer ends the jaw heads l9 and 20. These jaw heads are preferably formed with intermeshing teeth 21 having their meeting edges cut V shape to engage the shaft or drill and to grip it simultaneously with the gripping of the jaws 1 0.

Apair of coil springs 22 are connected together at one end by the loop 23 which loop fits in a. groove in the outer side of the head 19 and the springs extend tothe sides of the heads, the free ends being secured to screws 24 on .the head 20, thus spring holding the heads toward veach other and forming a spring grip.

A pressed steel casing 25 is secured to the head-19 having a portion extending underneath the same and the side portions thereof extend outwardly to inclose thesprings 22 protecting them from injury and to keep them from being fouled by chips from the work. It also keeps the jaws in alinement.

A pair of bosses 26 are formed on the outer face of the jaw 2O so that when the chuck is being used for drilling, these bosses Patented Nov. 8, 1921.

'will engage the work kwhen the drill vis pushed into theliinit and will provide a space to allow the cuttings to escape.

A small pin 27 is arranged in one of the main jaws against which the butt ofthe drill or shaft to be held in the chuck is abutted.V

A' chuck constructed as Vdescribed is particularly adapted for use in the drilling lhigh percentage in ordinary work. Vchuck may be used without the extension of small' holes where they are required to -be sunk to a considerable depth and byits use the holes may be bored with much greater accuracy and also at greater lspeed as the extension jaws support the drill at a point close to the work andthereby prevent its bending under the pressure applied thereto. By reason of this arrangement ra much greater than ordinary pressure can be placed upon the drill and consequently the work can be accomplished in less time.

In operation the butt of the drill is placed between the jaws of the extension chuck and pushed through into the main chuck. The chuck is then turned on the spindle l and both'sets of jaws are drawn inwardly togrip theV drill. The outer 'aws will not of course grip the drill as tightly as the inner vjaws but they will grip sufficiently tight to steady the drill and prevent bending and as the drill enters into the work the projecting bosses 2G engage the face thereof and the extension jaws slipping over the drill allow the drill-to advance .into the work,r the rods 18 receding into the main chuck.

The chuck may be used effectively in turning small shafts or spindles very effectively, as it will support the outer end which is being worked upon in an effective manner andits use will effect a very great saving in tools and material by preventing breakages which with small drills runs to a very member 'if ydesired Vand the construction of --the :extension member enables Vits Vremoval in Ya very rapid manner, it being lsimply Vnecessary to pull it up.

The telescopic feature eiiablesjthe very quick adjustment of the extension member .and allows Yof its luse' in many ways as it requires no adj ust-ment `during adjusts automatically. Y

\Vhat l claim las my invention .is :-V Y 11. In a chuck, the combination with the movable jaws, ofextensible jaw members operation but The Y ends of said-rods and adapted ,to grip the tool secured in the mainchuck jaws simuli taneously therewith.

f Ll. A- chuck having a pair of jaw members adapted to move in parallel relation in opening and closing and each `h aviiigal longitudinal guideway, a` pair ofrodsV slidably Yarranged one in each of said guifleways and extending parallel from said.jawsjaws on the outer ends of said rods adapted to grip VVthe tool-held in the main chuck, and spring Vmeans for holding the outer jaws` in close contact.-r Y Y Y l A Y.

5. InV a chuck, the combination with a pair of jaws adaptedv tobe moved longitudinally in parallel relation theone to the other andrfliaving `longitudinal parallelly arranged guideways, of a pair of rods slidably arranged in said guidewaysland extending parallelly beyond the chuck'fjaws, jaw heads arrangedupon the outerends of ksaid rods having transversely arranged `internieshing teeth, said teeth having Atheir adjacent yend surfaces cut with Vlongitudinal V-shaped grooves, and springV means for holding Athe latter jaws toward each other.

6. In a chuck, the combinationV with a lpair of jaws adapted `to be Vmoved longitudinally in parallel relation the vone to 'the other and having longitudinal parallelly arranged guidewa-ys, of a pair of .rods sliding para-Helly beyond .the chuck jaws, jaw

heads arrangedkon the, outerends of said rods and having y parallelly arranged V- ."sliaped. adjacentl surfaces,r` spiral tension springs arranged at-thesides of'said jaws 3and exerting a'ninward pressure, Vi and vaV guard casing extending Y outside of said springs. 4

.DoNailiD EMERY CARRIERE.

1 ably arranged insaid guideways and extend- Y 

